how can I prevent my sent emails being directed to junk

[kate4416]

I have been a BT broadband customer for decades and have a number of mailbox accounts. 

I am experiencing an increasing and unacceptably high number of my sent emails being directed to the recipients junk mail. 

This happens from all my BT mailboxes -  personal and ones I use for my business. I have no logos, images or anything suspicious that might trigger a filter. I'm fed up with having to resend and resend and then phone/text the recipient to ask they check their junk mail, where I am inevitably found languishing 

It is so annoying and makes me look like a numpty with my business customers. 

Is there anything I can do

Thank you  

[gg30340]

It is the recipients email service that is marking your email accounts as spam. You would need to ask them why. It could be that at some point your email accounts have been "spoofed" and were used to send spam. 

Email spoofing - Wikipedia

In any event you should consider getting a decent business email account instead of relying on a residential email account. A  business email account has a better SLA and is specifically for business users.